Clarifying Nerd Geek Dork

So, I thought there was a need to clarify the complete issue about the difference between a geek a nerd and a dork.
But googling about it, It seems there are several websites already dedicating to clarifying this. The problem is, non-geek or non-nerds don't seem to check this sites ... for obvious reasons I imagine... and so they keep using the terms as synonyms.

I found the best test to be the one in this dating? site.
It is a LONG test 60 questions, and the best one is #58 if you don't cheat, if you go directly to that one then the question is ruined, also unfortunately to see the result you have to be a member.

:(

I windup joining just to see it, and I was please with their definitions but amazed at this result "43 % Nerd, 56% Geek, 34% Dork"
uhm... I thought it is supposed to add to 100%. I think the dork percentage is the wrong one and should be lower.

And to finally clarify the difference, I will concur to what they said at the end of my test:

For The Record:

A Nerd is someone who is passionate about learning/being smart/academia.
A Geek is someone who is passionate about some particular area or subject, often an obscure or difficult one.
A Dork is someone who has difficulty with common social expectations/interactions.
You scored better than half in Geek, earning you the title of: Pure Geek.

It's not that you're a school junkie, like the nerd, and you don't really stand out in a crowd, like the dork, you just have some interests that aren't quite mainstream. Perhaps it's anime, perhaps it's computers, perhaps it's bottlecaps, perhaps it's all of those and more. Your interests take you to events and gatherings that are filled with people you find unusual and beyond-the-pale, but you don't quite consider yourself "of that crowd." Instead, you consider yourself to be fairly normal.